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Re: [EnergyPlus_Support] VertexEntry - Surface Geometry -- retract
Thanks for your reply Mike,
I have another question..
I am modelling two zones that share an internal wall, does each zone need to contribute a surface to the shared wall ie should i enter two surfaces, one for each zone so that there will be a wall from one zone adjacent another wall from the other zone?
If so does energyplus use just one construction for the shared wall and to calculate heat transfe or is there a doubling up of the cnstruction due to the two surfaces being side by side ?
In this case I want to calculate a cooling load but both zones will air conditioned to the same temp.
Tim
----- Original Message -----
From: Michael J. Witte
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Sent: Wednesday, September 22, 2004 2:22 PM
Subject: Re: [EnergyPlus_Support] VertexEntry - Surface Geometry -- retract
As Linda said, CW vs CCW will change the facing direction of the surface. To
check the resulting azimuth and tilt for all surfaces, add this command to your
input file:
Report, Surfaces, Details;
This produces a list of each surface in the eio output file which includes
azimuth, tilt, area, etc. It is comma delimited and most easily read by
putting into Excel or the like.
Mike
On 20 Sep 2004, at 15:45, Linda Lawrie wrote:
>
> At 11:02 PM 9/19/2004, Tim Britton wrote:
> >How crucial is it to enter all surfaces according to the VertexEntry field (ie
> >as either clockwise or anticlockwise) under Surface Geometry ? I am exporting
> >from Ecotect to EnergyPlus and the vertices of some surfaces are listed as
> >clockwise while others are listed as anticlockwise after exporting the idf file
> >to EnergyPlus. Is it necessary to correct the file so that all surfaces are
> >entered all the same or can it be left with some surfaces as clockwise and
> >others as anticlockwise?
>
> What I said before is WRONG. It always makes a difference if you're
> telling EnergyPlus that you're putting things in CW and end up CCW or vice
> versa. -- The difference, of course, is the facing direction and whether you've
> got it correct or not. I'm working on a method so I can tell if you're putting
> them in incorrectly (and then will issue a warning as well as correct the
> problem -- but not for this release 1.2.1)
>
> What I should have said is that the starting "corner" may be able to be
> changed -- If it's a flat surface (ceiling, roof or floor), then it may not
> matter. If it's a wall, it does matter, I believe.
>
> If I were you and Ecotect is not giving you the proper translation, I would
> certainly bring it to their attention.
>
>
> Linda
>
> EnergyPlus WebSite: http://www.energyplus.gov
> Owner: EnergyPlus_Support list
> Member: EnergyPlus Development Team
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
>
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
>
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
>
> Attachments are not allowed -- please post any files to the appropriate folder
> in the Files area of the Support Web Site.
>
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>
>
>
>
>
>
========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support
EnergyPlus-Support@xxxxxxxx
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